1 Reply Latest reply on Nov 3, 2010 4:28 AM by xsalefter.xsalefter.yahoo.com

Ask About Weld extension

xsalefter.xsalefter.yahoo.com Nov 2, 2010 12:36 AM

Hi.. All. I just get bit confused about weld extension and it's scanning behaviour:

There is a progess step order for each extension? (for example, BeforeBeanDiscovery is throws before ProcessAnnotatedType, or AfterDeploymentValidation is the last extension events, etc)

How to give default name to bean instance in weld? For example, I have a class

@View public class PersonDisplayUI extends JFrame {
  private JButton buttonCreate;
}

where View annotation is:

@Inherited
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Qualifier
@Named
public @interface View {
    String value() default "";
}

But when I try to get the name, using

<X> void processBean(@Observes ProcessBean<X> pb, BeanManager beanManager) {
  log.info("Process bean: " + pb.getBean().getName());
}

the result is

750 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
750 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
766 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
766 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
766 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
766 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
782 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
782 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
782 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
797 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
797 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
797 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
797 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
813 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
813 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
813 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null
813 [main] INFO org.xsalefter.sweld.annotation.impl.SweldManager - Process bean: null

How to get instance for each declared bean? For example, I want to get the instance of the PersonDisplayUI class in the extension code, get the property (buttonCreate), and register it with an event. Where I should do this? Should I use reflection manually, using getClass().newInstance() etc?

Thanks for your answer.

1. Re: Ask About Weld extension

xsalefter.xsalefter.yahoo.com Nov 3, 2010 4:28 AM (in response to xsalefter.xsalefter.yahoo.com)

Ok, I got some info from here . But the next problem is, when I try to use:

NamedLiteral literal = new NamedLiteral(pat.getAnnotatedType().getJavaClass());
for (Bean<?> bean : beanManager.getBeans(Object.class, literal)) {
  System.out.println("Bean bean " + bean);
}

The result print nothing. When I change the code to:

for (Bean<?> bean : beanManager.getBeans(Object.class, AnyLiteral.INSTANCE)) {
  System.out.println("Bean bean " + bean);
}

The result print only weld classes, and no classes in client point of view threated as bean classes. Here some example classes:

@Controller public class PersonController {}
@View public class PersonDisplayUI extends JFrame {}
@View public class PersonInsertUI extends JFrame {}

And Controller and View annotation look like this:

@Inherited
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Stereotype
public @interface Controller {
}

@Inherited
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Stereotype
public @interface View {
}